Activity A (continued from previous page)
2. Analyze: The yellow ring insid
this structure disappear by
The yellow ring inside the bacterial cell repre
e disappear by step 3 of the lytic cycle?cell represents the bacterial DNA. Why does

Next pretest: evolution select the correct answer in a laboratory population of flies, the female flies are gray and the males are yellowish gray. biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to successfully reproduce. what phenomenon could explain such a change? a sexual selection b. disruptive selection c. stabilizing selection d. directional selection

Describe the two types of vascular tissue

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above